Three.js Best Practices — Production Patterns That Ship
Three.js best practices from production: dispose properly, lazy-load scenes, cache geometries, stop the render loop when off-screen.
Three.js best practices boil down to memory management and frame budget. Memory: dispose() geometries and materials when scenes change (Three.js doesn't auto-garbage-collect GPU resources), reuse instances of common geometries (BoxGeometry doesn't need to be unique per cube), use BufferGeometry not the legacy Geometry class. Frame budget: pause render() when canvas is off-screen via IntersectionObserver, cap frame rate to 30FPS on low-tier devices, debounce window resize events. Pattern that catches most beginners: rendering the same scene 60 times per second when nothing changes. Use renderer.render() only when state changed, or accept the cost on simple sites with always-animating scenes.
Further reading
Three resources I recommend after this guide: the official Three.js fundamentals docs (excellent and underused), Bruno Simon's Three.js Journey (paid, comprehensive), and the React Three Fiber docs if you'll work in React. Beyond that, reading other developers' source on GitHub — search for 'three-js portfolio' on GitHub trending — accelerates learning faster than any tutorial.
Prerequisites
Before starting on three js best practices, you need: a JavaScript baseline (familiarity with ES modules, async/await, npm), a working local dev environment (Node 18+, a code editor), and a basic mental model of what WebGL renders. You don't need 3D modeling skills — for most tutorials, the assets are provided. Time investment: 2-4 hours of focused work for the basic version.
Step-by-step outline
Step 1: scaffold the project (Vite + Three.js). Step 2: get a basic scene rendering — camera, light, geometry. Step 3: load the asset (glTF). Step 4: hook up animation timeline (GSAP or built-in). Step 5: add interactivity (click, scroll). Step 6: optimize for mobile (device-tier check, asset compression). Step 7: deploy. Each step builds on the previous; skipping leads to confusion later.
Common pitfalls
Three failure modes I see beginners hit: (1) trying to render before assets finish loading — always wait for the loader callback, (2) using full-resolution textures on mobile — always have KTX2 or compressed alternatives, (3) leaving the scene rendering when off-screen — pause the render loop with IntersectionObserver. Each pitfall has a clear fix; the trick is recognizing the symptom.
Frequently asked questions
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